68 ORNL-DWG 67-406484
5 6 f t Oin.
F i g . 5.5.
-1
Reactor C e l l Thermal Shield o n d Component Supports.
they must a l s o provide t h e n e c e s s a r y biological shielding for the reactor. A s shown in F i g s . 5.6 and 5 . 7 , the reactor c e l l biological shielding c o n s i s t s of 7-ft-thick reinforced ordinary concrete around a l l s i d e s below grade and a n 8-ft t h i c k n e s s a b o v e grade. 'The top c o n s i s t s of removable concrete roof plugs having
a t o t a l t h i c k n e s s of 8 ft. T h e method of constriiction would b e to first pour t h e 2-ft-thick reinforced floor pad. A 3-in.-thick carbon s t e e l floor plate would b e laid over t h i s , and t h e 3-in.-steel vertical wall p l a t e s would b e welded t o i t , t h e latter s e r v ing as forms for pouring t h e s i d e w a l l s . A s e c o n d 3-in. -thick steel plate would be erected inside the